Safety suggestions include.
Make sure the helmet fits the childs head comfortably before buying it.
The helmet should sit just above the eyebrows.
A correctly fitted helmet cant be moved around on the head, either forwards and backwards or sideways.
The chinstrap must always be fastened firmly and never twisted.
Impediments like ponytails and hair clips should not be worn.
Always replace helmets after an impact or accident, or if the materials split or deteriorate.
Clean the helmet according to the manufacturers instructions, as some cleaning products may cause damage.